Theft of items from bags or bags entirely – a rather unpleasant incident. To prevent attempt of theft is offered by the Serenity device that looks like a keychain. The device is equipped with buttons for code entry and be attached to “dog” lightning or on a specific pocket. If someone else tries to open the bag, Serenity will scare the attacker an audible signal 100 dB. Siren will work as long as the movement of the bag does not stop. On request the owner can add to the number of users 6 mobile devices that will allow, for example, family members freely to open the bag. If the owner forgot things and got away from them at a certain distance, Serenity will send a Push notification with an appropriate reminder. To open the bag, the user has to enter a password in the app on your smartphone or unlock manually. Currently the Serenity device is available for pre-order on Kickstarter for $79.